VM: Intrinsify double arithmetic operations with a smi rhs.

runtime/vm/intrinsifier_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 1270 matching lines @@
 
 void Intrinsifier::Double_lessEqualThan(Assembler* assembler) {
   CompareDoubles(assembler, LS);
 }
 
 
 // Expects left argument to be double (receiver). Right argument is unknown.
 // Both arguments are on stack.
 static void DoubleArithmeticOperations(Assembler* assembler, Token::Kind kind) {
   if (TargetCPUFeatures::vfp_supported()) {
-    Label fall_through;
+    Label fall_through, is_smi, double_op;
 
-    TestLastArgumentIsDouble(assembler, &fall_through, &fall_through);
+    TestLastArgumentIsDouble(assembler, &is_smi, &fall_through);
     // Both arguments are double, right operand is in R0.
     __ LoadDFromOffset(D1, R0, Double::value_offset() - kHeapObjectTag);
+    __ Bind(&double_op);
     __ ldr(R0, Address(SP, 1 * kWordSize));  // Left argument.
     __ LoadDFromOffset(D0, R0, Double::value_offset() - kHeapObjectTag);
     switch (kind) {
       case Token::kADD: __ vaddd(D0, D0, D1); break;
       case Token::kSUB: __ vsubd(D0, D0, D1); break;
       case Token::kMUL: __ vmuld(D0, D0, D1); break;
       case Token::kDIV: __ vdivd(D0, D0, D1); break;
       default: UNREACHABLE();
     }
     const Class& double_class = Class::Handle(
         Isolate::Current()->object_store()->double_class());
     __ TryAllocate(double_class, &fall_through, R0, R1);  // Result register.
     __ StoreDToOffset(D0, R0, Double::value_offset() - kHeapObjectTag);
     __ Ret();
+    __ Bind(&is_smi);  // Convert R0 to a double.
+    __ SmiUntag(R0);
+    __ vmovsr(S0, R0);
+    __ vcvtdi(D1, S0);
+    __ b(&double_op);  // Then do the comparison.
     __ Bind(&fall_through);
   }
 }
 
 
 void Intrinsifier::Double_add(Assembler* assembler) {
   DoubleArithmeticOperations(assembler, Token::kADD);
 }
 
 
@@ skipping 794 matching lines @@
 
 void Intrinsifier::Profiler_getCurrentTag(Assembler* assembler) {
   __ LoadIsolate(R0);
   __ ldr(R0, Address(R0, Isolate::current_tag_offset()));
   __ Ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM